Exhaust-nozzle for locomotives



2 Sheets-Sheet 1.

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y E. IW. MRRIS.A EXHAUST NOZZLE PGR LOGOMOTIVBS.

APatented Jan. 30, 1894.

WIZWESSES 2 Sw I R R A H v UL EXHAUST NOZZLE .POR LOGOMOTIVS.

Patented Jan. 30, 1894.

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Unirse STATES ATENT ENCE@ ERWIN WV. HARRIS, OF PALISADE, NEVADA.

EXHAU ST-NOZZLEY FOR LOCOIVIOTIVES.

SPECIFICATION forming part of Letters Patent No. 513,923, dated January 30, 1894.

Application tiled October 5,1893. Seria1No.48'7.261. (No'model.)

.To all-whom t may concern:

Be it known that I, ERWIN W. HARRIS, a citizen of the United States of America, residing at Palisade, in the county of Eureka and State of Nevada, have invented certain new and useful Improvements in Exhaust-Nozzles for Locomotives; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in variable exhaust nozzles for locomotives and engines.

The objectoi the invention is to provide an exhaust nozzle of improved construction in which the area of the exhaust opening can bel made larger or smaller as the work of the engine is increased orv diminished; also to connect the reverse lever of the engine with the rods for operating the exhaust nozzle, so that the area of the opening in the exhaust nozzle will be changed with the movement of the reverse-lever.

In the accompanying drawings, forming part vof this specification, Figure 1 is a top plan view in section showing the connection of the exhaust nozzle with the rod or lever employed for starting and stopping the engine. Fig. 2 is a front elevation of Ya boiler containing my improved nozzle and showing its connection with the operating levers, the front end of the boiler being removed. Fig. 3 is a plan view of the casing forming a part ofthe exhaust nozzle. Fig. 4 is a vertical section through the improved nozzle. Fig. 5 is a plan view of the operating ring to which the connecting rod is attached, sothat when moved the size of the opening will be increased or climinished. Fig. 6 is a plan view of the covering plate. Fig. 7 is a detail perspective view of one of the adjustable blocks carried by the casing and engaging the slots in the ring. Fig. 8 is a plan view showing the manner of connecting one of the operating rods with the starting and stopping mechanism of the engine; and Fig. 9 is a detail sectional view on the line 9-9 of Fig. 8.

A designates the exhaust nozzle which is arranged as usual to direct the exhaust steam from the cylinder in an upward direction through the stack. The exhaust nozzle comprises a casing A which may belet into the exhaust pipes from the cylinder attheirjunction therewith or secured thereto by bolts which pass through the iianges of the casing,

`and this easing is provided with a series ot recesses a a. It will be noticed that the parts of the casing between the recesses a project inward and are inclined or beveled on their lower edges from the casing upward to a point where they meet the inwardly projecting portions which intersect the passageway for the exhaust steam.

B'designatesa series of blocks which are placed in the recesses a of the casing A and are adapted to be moved in said recesses by an operating ring C. The blocks B are provided with upwardly projecting pins b which engage with slots c formed in the ring at a tangent with the inner edge of the same. This operating ring is provided with an outwardly projecting arm C' with which a connecting rodD engages.

C2 designates a covering plate having centrally an opening which corresponds with the opening in the operating ring and exhaust nozzle, and this plate has also apertured lugs which register with the apertured lugs of a flanged ring A2, said apertured l-ugs providing means for connecting the plate C2, operating ring C and flanged ring A2 to the casing. The plate Cz'is slightly dished so that the pins b will not abut against the same.

It will be noted that the blocks B are beveled on their under sides, as at b2.

In an exhaust nozzle constructed as hereinbefore described the size of the vopening may be increased or diminished by moving'tlie operating ring which engages with the pins projecting from the blocks B and moves said blocks in or out, and as with my improvement the adjustment of the size of the exhaust nozzle is varied with the work of the engine the back pressure will be' overcome to a great extent. f

The connecting rod D passes through the outer casing of the boiler and is connected by a link d with a bell-crank lever E which is mounted on a suitable support attached to the side of the boiler, the other arm of the bellcrank lever engaging with a link or the end of a rod F, this rod being connected directly to a Wrist-pin f attached to or formed on an eccentric pinion G. The pinion Gr engages with a rack-bar H, the edge of said rack-bai' opposite the teeth which engage with the pinion being beveled as shown at h for engagement with a grooved guide-roller h suitably supported. It will be noted that the rack-bar H inclines from its center toward each end and that such inclination corresponds with the eccentricity of the pinion G, so that the teeth of said pinion will at all times be in engagement with the teeth of the rack-bar. The object of providing the eccentric pinion and a rack-bar with an inclined rear edge is to permit a swinging or oscillating movement of the rack-bar corresponding with the movement of the reverse lever to which the rackbar is attached by the rigid connecting rod I, the end of said rod having an eye t" through which an ordinary bolt passes for connecting the rod with the reverse lever. By directly connecting the mechanism for operating,r the blocks D of the exhaust nozzle with the reverse-lever the size of the exhaust opening is varied with the position of the reverse lever, thereby making these two important parts so that they will act in unison. In practice when the rod F is on a line with the rack-bar H the blocks B which increase and diminish the size ot' the opening in the exhaust nozzle will be positioned to reduce the size of the opening to its smallest limit. The movement of the reverse lever to start the engine either backward or forward will move the rack-bar and turn the eccentric pinion so that the rod F will move the connecting rod D to turn the operating ring a distance corresponding with the movement of the reverse lever; thus the movement of the reverse lever governs the size of the opening in the exhaust nozzle whether said reverse leveris thrown to cause the engine to move backward or forward.

The reverse lever referred to is of ordinary construction and moves in the arc of a circle, the rod I being pivotally connected thereto.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. In a variable exhaust for engines, the combination, of a casing having a series of radial recesses, blocks located in said recesses, said blocks having upwardly projecting pins which engage with an operating ring having inclined slots so that when said ring is turned the blocks will be retracted or projected to increase or diminish the size of the exhaust nozzle, substantially as shown, and for the purpose set forth.

2. In a variable exhaust, the combination,

of a casing having a series of radial recesses, blocks adapted to lie within said recesses and provided with upwardly projecting pins, a ring havinginclined slots with which the pins engage and an arm which projects from said ring and engages with a connecting-iod which passes through the casing of the boiler, substantially as shown, and for the purpose set forth.

3. In a variable exhaust nozzle, the combination, of a casing which is adapted to be secured to the exhaust pipe, said casing having a series of recesses the side walls of which project so as to intersect the exhaust opening,

the projecting walls being beveled on their under sides, together with a series of blocks B beveled on their under sides and provided with upwardly projecting portions which engage with inclined slots formed in an operating ring, substantially as shown, and for the purpose set forth.

4. In a variable exhaust nozzle, the combination, of a casing having radial recesses the dividing walls of which project so as tointersect the exhaust passage,a series of movable blocks located in said recesses and having projecting pins, an operating ring having an outwardly projecting arm and inclined slots which engage the projections on the movable blocks, a plate C2 secured to the casing above the operating ring, and means for connecting the operating ring to a lever, for the purpose set forth.

5. In combination with a variable exhaust nozzle, an operating rod for moving slides which increase and diminish the size of the opening of said nozzle, connecting-rods arranged as shown, one of the connecting-rods engaging with an eccentric pinion which is operated by a rack-bar held in pivotal engagement with the reverse lever, for the purpose set forth.

6. In combination with the reverse lever of an engine, a rack-bar havingan inclined portion opposite the rack-teeth of an eccentric pinion having a pin with which a reciproeating operating rod engages, said rod being connected with the valve mechanism, for the purpose set forth.

7. In combination with a variable exhaust nozzle, of a connecting rod and rack-bar, said rack-bar engaging an eccentric pinion, and means for holding the rack-bar in engagement with said pinion, substantially as shown, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ERWIN W. HARRIS.

Witnesses:

J. B. RICE, C. D. CAMERON.

IOO 

